The document provides an overview of diodes, emphasizing their function as two-terminal electronic components that allow current to flow in one direction. It discusses various types of diodes, their formation with p-type and n-type materials, and applications in rectification, clipping, clamping, logic gates, voltage multiplier circuits, and protection in devices like solar panels and chargers. The presentation highlights the importance of diodes in everyday electronics and their role in preventing voltage spikes and overheating.

1. Welcome To The Presentation

2. Diode
A diode is a two terminal electronic
component which conducts current primarily
in one direction. It has zero resistance in one
direction and high resistance in another
direction

3. Application of Diodes
Presented By
Iftekhar Bhuiyan 2017-1-50-027
Seemanto Barman 2017-1-50-017
Tauhidul Islam (Atoul) 2017-1-50-005
Presented To
Iffat Alam
Lecturer
Electronics and Communications
Engineering

4. Formation of
Diode
 A diode is formed with a
two type semiconductor
materials which one is p-
type and another is n-type.
In p-type material the
majority is holes and in n-
type electrons are major.
The current will only flow
when the p type is
connected with positive
terminal and n type is
connected to negative
terminal.

5. Laser Diode
PN Junction Diode
PIN Diode
Zener Diode
Photodiode
Light Emitting Diode
Diode
Different Types of Diode

6. Reverse
Current
Protection
Daily Life
Solar
Panels
Voltage Spike
Suppression
Rectifier
Clipping
Clamping
Voltage
Multiplier
Applications of Diode

7. Diode Rectifier
The most common and important
application of a diode is the
rectification of AC power to DC
power. Using the diodes, we can
construct different types of rectifier
circuits:
o Half Wave
o Full Wave

8. Clipping
Clipping means to cut off. Diode is
used to clipping.
In FM transmitters where noise
peaks are limited to a particular
value so that excessive peaks are
removed from them. The clipper
circuit is used to put off the
voltage beyond the preset value
without disturbing the part of the
input waveform.

9. Clamping
Clamping is called as level shifter or DC restorer. This circuit is
used to shift or alter either positive or negative peak of an input
signal to desired level. In positive clamping circuits negative
peaks are raised upwards and in negative clamping circuits
positive peaks are clamped so that it pushes downwards.

10. Logic Gates
 The diode can perform logic
operations such as AND OR etc.
gates. Low and high impedance
states of logic switch are
analogous to the forward and
reverse-biased conditions of the
diode respectively.

11. Reverse
Current
Protection
There could an accidental
connection to connecting the
battery in a wrong way or
reversing the polarities of the DC
supply. For avoiding this a
protective or blocking diode is
connected in series with the
positive side of the input to avoid
the reverse connection problem.

12. Voltage Multiplier
Circuits
Voltage multiplier consist of two or
more diode rectifier circuits which are
cascaded to produce a DC output
voltage equal to multiplier of the
applied input voltage. These multiplier
circuits are of different types like
double, triple, quadruple etc. by the
usage of diodes combination with
capacitor, we get the odd or even
multiple of the input peak voltage at the
output.
Voltage Multiplier
Circuits
Voltage Spike
Suppression
Solar Panels
In Daily Life
x
x
x
x
Voltage Spike
Suppression
In circuits sudden removal of supply
source produces a higher voltage due to
its stored magnetic field energy. These
unexpected spikes in the voltage can
cause the considerable damage to the
circuit components. A diode is
connected across the inductor or
inductive loads to limit the large voltage
spikes.
Solar Panels
The diodes which are used for
protection of solar panels are called as
bypass diodes. If the solar panel is faulty
or damaged or shaded by fallen leaves,
snow and other obstructions, the
overall output power decreases and
arise hot spot damage because the
current of the rest of the cells must flow
through this faulty or shaded cell causes
a overheating. The main function of the
bypass diode is to protect the solar cells
against this hot spot heating problem
In Daily Life
Chargers: Your mobile charger is actually a rectifier(converts
AC to DC). Every type of rectifier is made up of diodes.
AM/FM Radio: Diode is a vital component in AM/FM
receiver. They are used in separating the message signal
from the modulating signal(commonly known as
demodulation).
Noise reduction mic found in smartphones: The noise
reductions mics are basically clipping circuits and they are
made up of diodes.
On/Off indicators: LEDs are used in almost every electronic
gadget as an on/off indicator.
LASER: LASERs find application in laser printers, CD/DVD
players to read/write data, optical fiber
communication(without which superfast internet these days
would be impossible).
Applications